[INFO] fetching crate crumble 0.10.2...
[INFO] documenting crumble-0.10.2 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate crumble 0.10.2 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate crumble 0.10.2 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crumble 0.10.2
[INFO] finished tweaking crates.io crate crumble 0.10.2
[INFO] tweaked toml for crates.io crate crumble 0.10.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8363a48b6887b78d1f0381a9bd45293bc65299ff81d9804927800b51633d512
[INFO] running `Command { std: "docker" "start" "-a" "d8363a48b6887b78d1f0381a9bd45293bc65299ff81d9804927800b51633d512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8363a48b6887b78d1f0381a9bd45293bc65299ff81d9804927800b51633d512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8363a48b6887b78d1f0381a9bd45293bc65299ff81d9804927800b51633d512", kill_on_drop: false }`
[INFO] [stdout] d8363a48b6887b78d1f0381a9bd45293bc65299ff81d9804927800b51633d512
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2114938f9ef39e4cc6f201aae54eec45e16719ae53ce0ff233c9c435fcfdfab1
[INFO] running `Command { std: "docker" "start" "-a" "2114938f9ef39e4cc6f201aae54eec45e16719ae53ce0ff233c9c435fcfdfab1", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]     Checking regex-syntax v0.7.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking regex v1.8.1
[INFO] [stderr]     Checking chrono v0.4.24
[INFO] [stderr]  Documenting crumble v0.10.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![feature(test)]
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `crumble`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name crumble src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=50d10090f05e7256 -L dependency=/opt/rustwide/target/debug/deps --extern base64=/opt/rustwide/target/debug/deps/libbase64-5d4f3ec9a74cb9d7.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-f9c4861051271527.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-9c7d51f549cf58b7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-551828a6df28d000.rmeta --cap-lints=warn --crate-version 0.10.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2114938f9ef39e4cc6f201aae54eec45e16719ae53ce0ff233c9c435fcfdfab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2114938f9ef39e4cc6f201aae54eec45e16719ae53ce0ff233c9c435fcfdfab1", kill_on_drop: false }`
[INFO] [stdout] 2114938f9ef39e4cc6f201aae54eec45e16719ae53ce0ff233c9c435fcfdfab1
